Alternatives to Retarus Email Security

It suits people who want to screen and delete unwanted email before downloading messages, particularly users with accounts or mail programs listed by Firetrust.

Rspamd suits organizations operating their own mail systems and seeking gateway filtering with control over message data and custom rules.

JetEmail suits developers, businesses, and hosting providers needing transactional email, filtering, or marketing tools.

Mailprotector

Mailprotector is aimed at managed service providers seeking email security and management products for their customers.

It suits hosting providers running mail at scale, especially those managing multiple customer domains.

Cleanmail

Cleanmail is presented for businesses, health-sector and public organisations, and managed service providers that need email filtering and continuity options.

Symantec IT Management Suite

It is aimed at IT teams handling endpoint and server deployment, patching, asset records, and policy management in complex environments.

It suits organizations, schools, churches, public offices and personal domain owners using standard SMTP servers for owned domains.

Sophos Email suits organizations seeking email threat defense, data loss prevention, encryption, and user-awareness features.

SpamHero suits organizations that want cloud filtering in front of a domain’s mail server, including Microsoft 365 or Google Workspace users.

Mailinblack Protect

Protect suits companies, public administrations, and healthcare institutions seeking managed email threat filtering.